Here you go, this is the stuff!
Ant Problem? Terro = Ant Control Solutions
This Terro Ant Killer is simply awesome stuff. I've got no ants around here, and I used to have more than all the Roman legions. It is a little clear plastic tray with a clear gooey sugary liquid inside. You take scissors and snip a small slit in the bottom on one side of the tray, where it is marked for cutting it open. Then you put it where the ants have been coming by.
Last time I used it, was at an apartment I am remodelling. I had noticed a lot of ants around. Then I left a bag of banana chips on top of the fridge. Next day, I saw the ants had gotten into it. So I put a tray on top of the fridge, on a small wood scrap, so it wouldn't get on the surface of the fridge, next to the bag of chips. But by that time, the ants were almost finished with the chips, and they never seemed to notice the Terro bait, didn't bother with it at all. Later that day I looked and the ants were gone, finished with the chips. I was disappointed, since this stuff had never failed me, but figured I had just been too late putting out the bait and there weren't enough of them coming by to find it. A few days later, I looked at the bait tray. Completely empty. Never saw another ant around there, and this place had a really bad ant problem. I guess one of their scouts found it, and rallied the troops!!
I can't tell you how many other kinds of ant pesticide products I've used before with mediocre results, at best. The problem was that the ants just did not seem interested in the other stuff. But they seem to love this stuff, since it is basically a very sugary liquid. They take it back to the nest, and another ant civilization is history!
Another good thing about it is that, as pesticides go, it is not really nasty stuff in terms of toxicity for humans. Of course, you don't want to eat it or feed it to your kid, but the active ingredient is just borax, a salt of boric acid, which is used in many soaps, cosmetics, and as a food additive. Wikipedia says, "Borax is used as a food additive in some countries with the E number E285, but is banned in the United States. Its use is similar to salt, and it appears in French and Iranian caviar." Caviar? H-m-m-m, guess the ants figure it is a pretty classy meal for them, a real treat!
BTW, they sell it in different forms, but the trays seems the easiest and most effective one. 6 trays for $8.99 on their website, although I buy it at the store, as all the hardware stores in the US are stocking it now. They say to put out all 6 trays at once. When I first got the stuff, my house was turning into the galaxy of ants, so I did put out all the trays, and probably needed them, as the ant population was easily in the billions and they were overrunning the place and coming in from every direction. But now, if I spot an army somewhere, like at the apartment, I just put out one tray, and presto, in a day or two, no more ants!!